Answer the following questions. (a) The half cell containing Zn/Zn^2+ is the (b)

Question

Answer the following questions. (a) The half cell containing Zn/Zn^2+ is the (b) Which one of the following statements is TRUE for the half cell containing Zn and Zn^2+. Zn^2+ will be oxidized to form Zn. Zn^2+ will be reduced to form Zn. Zn will be oxidized to form Zn^2+. Zn will be reduced to form Zn^2+. (c) The half cell containing Ge^4+/Ge is the (d) Which one of the following statements is TRUE for the half cell containing greaterthanorequalto and Ge^4+. Ge^4+ will be oxidized to form Ge. Ge^4+ will be reduced to form Ge. greaterthanorequalto will be oxidized to form Ge^4+. greaterthanorequalto will be reduced to form Ge^4+.

Explanation / Answer

In the given standard reduction potential , the reduction potential of Ge4+ is more than that of Zn2+ , Ge4+ acts as cathode & at cathode reduction takes place .

where as the Zn2+ will acts as anode & oxidation takes place at anode

At anode (oxidation takes place ) : Zn <---> Zn2+ + 2e-

At cathode (reduction takes place) : Ge4+ + 4e- <---> Ge

The overall reaction is : Ge4+ + 4e- +2 Zn <---> 2Zn2+ + 4e- + Ge

+4 0 +2 0

   OR Ge4+ +2 Zn <---> 2Zn2+ + Ge ---(1)

So (a) the half cell containing Zn/Zn2+ is anode

(c) The half cell containing Ge4+/Ge is cathode

(b) From (1) Zn will be oxidized to form Zn2+

(d) Ge4+ is reduced to form Ge

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